#15400: Matrix actions for quadratic forms are broken
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Reporter: roed | Owner:
Type: defect | Status: new
Priority: critical | Milestone: sage-5.13
Component: quadratic forms | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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Actions of 2x2 matrices on binary quadratic forms don't work:
{{{
sage: Q = BinaryQF([1,2,3]); Q
x^2 + 2*x*y + 3*y^2
sage: A = matrix(QQ,2,2,[1,2,3,4])
sage: R.<x,y> = QQ[]
sage: Q(x+2*y,3*x+4*y)
34*x^2 + 96*x*y + 68*y^2
sage: Q.matrix_action_left(A)
17*x^2 + 74*x*y + 81*y^2
}}}
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Ticket URL: <http://trac.sagemath.org/ticket/15400>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
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